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. We describe the user modeling and personalization techniques adopted in SETA, a prototype toolkit for the construction of adaptive Web stores which customize the interaction with users. The Web stores created using SETA suggest the items best fitting the customers' needs and adapt the layout and the description of the store catalog to their preferences and expertise. SETA uses stereotypical information to handle the user models and applies personalization rules to dynamically generate the hypertextual pages presenting products. The system adapts the graphical aspect, length and terminology used in the descriptions to parameters like the user's receptivity, expertise and interests. Moreover, it maintains a model associated with each person the goods are selected for; in this way, multiple criteria can be applied for tailoring the selection of items to the preferences of their beneficiaries. Keywords: user modeling, personalized information presentation, customization of Web stores, ...

This paper presents INTRIGUE, a prototype tourist information server that presents information about the area around Torino city, on desktop and handset devices. This system recommends sightseeing destinations and itineraries by taking into account the preferences of heterogeneous tourist groups (such as families with children and elderly) and explains the recommendations by addressing the group members' requirements. Moreover the system provides an interactive agenda for scheduling the tour. The services offered by INTRIGUE rely on user modeling and adaptive hypermedia techniques; furthermore, XML-based technologies support the generation of the user interface and its adaptation to Web browsers and WAP minibrowsers.

A context-aware system can adapt its behaviour according to the user’s personal or environmental context. Historically, user models have been used to enable the adaptation and personalisation of services or information delivered to users. However, despite the apparent correlation between the two approaches, the utilisation of user modelling techniques within the domain of context-aware computing is a relatively unexploited research area. In this paper, we explore the relationship between context-awareness and user modelling, through the design of a context-aware personal assistant, which we call our Personal Digital Secretary (PDS). The requirements for this application make demands on both user modelling and context-aware techniques. In order to investigate these requirements and facilitate the design of the PDS, a number of scenarios are considered. Finally, several issues for engineering our PDS are investigated and discussed. 1.

This paper discusses the provision of ubiquitous services for desktop and handheld interfaces. The focus of the paper is on the interactive agenda offered by INTRIGUE, a tourist information server which assists the user in the organization of a tour by providing personalized recommendations of tourist attractions and helping the user to schedule her itinerary. The interactive agenda can be accessed both remotely, by interacting with the central server, and locally to the user's device.

This paper presents two empirical usability studies based on techniques from Human-Computer Interaction #HCI# and software engineering, whichwere used to elicitate requirements for the design of a hypertext generation system. Here we will discuss the #ndings of these studies, whichwere used to motivate the choice of adaptivity techniques.